Resumo
According previous studies about longevity in maize by ACCORSI e ADÂMOLI DE BARROS, (1961) the authors presents in this paper the results of work on longevity of seedlings of beans. Seeds were separated in three groups according their weight, as followings: small 80-120 mg; medium 130-140 mg and big 150-200 mg. The sowing of the seeds was made in pure sand and the seedlings were distributed in distil. water and in complete solution of Arnon and Hoagland. Each treatment was made in two replications with eight seedlings by treatment. At present time the following conclusions can be related: 1.°) - Eight days after germination, the cotiledones of all the seedlings started to fell down, fourteen days after, all cotiledones had fell down. 2.°) - Fifteen days after germination, the seedlings in nutritive solution showed better development than those in distil. water. Table I e II gives results. 3.°) - All seedlings in distil. water showed symptoms of N, Ca, Fe deficiencies. 4.°) - Twenty nine days after germination the seedlings in distil. water manifested exhaust trace, by falling of the leaves and death of some plants although the aplicai buds keep green. 5.°) - After thirty-one days the plants in nutritives solution was in better condition than those in distil. water, although some alteration aboved mentioned was observed. The causes of this alteration are being studied. 6.°) - In many plants in complet solution the seminal leaves showed clorosis initial and some with necrosis, although apical buds keeps in ativity. 7.°) - Symptoms of clorosis and necrosis in diferents stages were observed in all leaflet; these symptoms were more strong in the groups of little seed and medium seeds.
Observações preliminares sôbre a longevidade dos "Seedlings" de feijoeiro - Phaseolus vulgaris : em função das reservas cotiledonares* * Experimento realizado com auxilio financeiro concedido pela Fundação de Amparo à Pesquisa do Estado de São Paulo.
Walter R. Accorsi; Clóvis F. O. Santos; Eduardo C. Ferraz; Myrthes A. Adâmoli de Barros; José Mitidieri
Escola Superior de Agricultura "Luiz de Queiroz", USP Piracicaba, S. Paulo 1964
SUMMARY
According previous studies about longevity in maize by ACCORSI e ADÂMOLI DE BARROS, (1961) the authors presents in this paper the results of work on longevity of seedlings of beans.
Seeds were separated in three groups according their weight, as followings: small 80-120 mg; medium 130-140 mg and big 150-200 mg.
The sowing of the seeds was made in pure sand and the seedlings were distributed in distil. water and in complete solution of Arnon and Hoagland. Each treatment was made in two replications with eight seedlings by treatment.
At present time the following conclusions can be related:
1.°) - Eight days after germination, the cotiledones of all the seedlings started to fell down, fourteen days after, all cotiledones had fell down.
2.°) - Fifteen days after germination, the seedlings in nutritive solution showed better development than those in distil. water. Table I e II gives results.
3.°) - All seedlings in distil. water showed symptoms of N, Ca, Fe deficiencies.
4.°) - Twenty nine days after germination the seedlings in distil. water manifested exhaust trace, by falling of the leaves and death of some plants although the aplicai buds keep green.
5.°) - After thirty-one days the plants in nutritives solution was in better condition than those in distil. water, although some alteration aboved mentioned was observed. The causes of this alteration are being studied.
6.°) - In many plants in complet solution the seminal leaves showed clorosis initial and some with necrosis, although apical buds keeps in ativity.
7.°) - Symptoms of clorosis and necrosis in diferents stages were observed in all leaflet; these symptoms were more strong in the groups of little seed and medium seeds.
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BIBLIOGRAFIA
- ACCORSI, W.R. e ADAMOLI DE BARROS, M.A. (1961) - "Longevidade dos "Seedlings" de Milho em Função das Reservas do Endosperma". Aguardando publicação.
- BROYER, T.C. e STOUT, P.R. (1959) - "The Macronutrient Elements" Ann. Rev. Plant Physiol. Vol. 10: 277-300.
- D.J.D. NICHOLAS (1961) - "Minor Mineral Nutrients". Ann. Rev. Plant Physiol. Vol. 12: 63-90.
- GRANER, E.A. e GODOY, C.J. (1959) - "Culturas da Fazenda Brasileira" l.Ş Edição, Editora Melhoramentos.
- HAMBIDGE, G. (1949) - Editor. "Hunger Signs in Crops". 2nd. Ed. Judd and Dtweiller. Washington.
- HEWITT, E.J. (1952) - "Sand and Water Culture Methods used in the Study of Plant Nutrition". Commonwealth Agricultural Bureaux" Farnham Royal, England.
- HOAGLAND, D.R. (1944) - "Lectures on the Inorganic Nutrition of Plants" Chronica Botanica Co. Waltham, Mass.
- MEYER, B.S. and ANDERSON, D.B. (1952) - "Plant Physiology" 2nd. Ed.
- VAN DER VEEN, R. and MEIJER, G. (1959) - "Light and Plant Growth". Philips Tecnical Library.
Datas de Publicação
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Publicação nesta coleção
27 Jun 2012 -
Data do Fascículo
1964
